CPH Physics Heat

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For demonstrating the expansion by heating and contraction by cooling. A steel rod mounted to a support with wooden handle. Gap gauge made of brass with handle, just fits over ends of bar at room temperature. It includes two holes which just accept the ends of the bar. The bar won’t fit the gap gauge when heated.

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Suitable for the demonstration of convection currents in the air. A metal box 20 x 10 x 10cm with baked enamel finish has a sliding glass plate front and two glass chimneys. A candle is placed under one of the chimneys and a smoke source is held at the tip of the other chimney to reveal the flow of convection current. Candle and smoke source not included.

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To demonstrate unequal expansion of different metals when heated. This 200 x Comm strip of two different metals is fitted on a wooden handle. Because the coefficients of linear expansion of brass and steel are different. the strip starts bending upon heating. 

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To demonstrate curvature induced by unequal expansion. Two metal strips of brass and iron are riveted together from end to end and fitted with a wooden handle. When heated, the strips start curving dramatically.

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To demonstrate unequal expansion of different metals when heated. This 200 x 10mm strip of two different metals is fitted on a wooden handle. Because the coefficients of linear expansion of brass and steel are different, the strip starts bending upon heating.

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This radiometer works like a solar engine and converts light into motion and demonstrates radial heat. An evacuated glass bulb contains a fine pivot at its center which supports four light weight metal arms, each carrying a vane of mica with one side blackened. Expose the bulb to the sunlight or the high light levels and you can watch the vanes spin as the black sides absorb more heat than the white ones.  

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To show the convection of heat in liquid, a rectangular borosilicate glass tube with an opening at the top for filling liquids. On heating one of the corners of the glass tube after filling it with water and adding some dye at the top you can see the dye following the path of the convection current. Size 15 x 21cm.

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It consists of one Polished spun calorimeter 75 x 50 mm which is contained in an outer spun aluminum vesel 100 x 75 mm dia with thermoform or felt as insulating material in between. covered with a plastic ring. The outer vessel has Plastic Lid having two hote. one with rubber stopper drilled for thermometer and the other for the stirrer. Stirrer included. Supplied without thermometer.

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For demonstrating volumetric expansion of metals. It consists of a brass ring and a brass ball of about 25mm dia, both mounted on a separate metal rod with wooden handles or mounted on a single rod with the ball attached with the metal rod with the help of a chain. When cool the brass ball passes easily through the matching brass ring; when hot it wont go through.

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To demonstrate and determine the coefficient of volume expansion of liquids. A borosilicate glass bulb with a funnel top capillary stem to hold 10ml of liquid. The capillary stem is graduated to 0.05 x 0.01ml.

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It is designed to use with a steam boiler to trap condensed steam. A borosilicate glass chamber with curved inner tube and a drainage outlet prevents drops of condensed steam from passing through the trap.

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To show the maximum density of water, a metal cylinder with two tubulures in the lower and upper part for carrying thermometers is mounted on a base and encircled midway along its length by a gallery for holding a mixture of ice and salt. Temperature of the water is measured at the top and bottom of the inner cylindrical vessel over a period as the water cools. Thermometers not included.

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For demonstrating conduction of heat, set of four different wires of aluminum, brass, copper and half glass half iron. Size 250 x 3mm (L x D).

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Comprises of a set of two calorimeters as mentioned in CPH-357. The plastic lid covering the outer calorimeter has a built in coil which works on 6V power source, two holes for thermometer and stirrer with insulated handle and two 4mm socket terminals for connections. Complete with stirrer but without thermometer.

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Same as two-stroke diesel engine but with chain drive from crankshaft for camp operated jerk pump and inlet exhaust valves.

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To record the melting point temperatures of different solid substances easily and economically. It consists of an aluminum alloy cylinder of 63mm dia and 50mm high with a slanting hole of 7mm dia drilled in the top for a thermometer. The melting point can be recorded by placing the sample of substance on the top of the cylinder and heating it gently with a Bunsen Burner.